(Contents information excerpted from The Internet Speculative Fiction Database)
Art:
- Hypothetical Planet by Mel Hunter
- Hoax by Frank Kelly Freas
- N4 N5 N6 by Paul Orban
- The Earthman by Ed Emshwiller
- Laboratory by Ed Emshwiller
- The Barbarians by Paul Orban
- Promised Planet by Mel Hunter
- The Happy Clown by Frank Kelly Freas
- Scene On Europa by Mel Hunter
Essays:
- The Odd Genre (If, December 1955) by Forrest J. Ackerman
- What Is Your Science I. Q.? (If, December 1955) by uncredited
- Worth Citing (If, December 1955) by uncredited
- Science Briefs (If, December 1955) by uncredited
- Hue and Cry (If, December 1955) by uncredited
Novelettes:
- Hoax by James E. Gunn
- The Earthman by Irving E. Cox, Jr.
Short Stories:
- N4 N5 N6 by James McKimmey, Jr.
- Laboratory by Jerome Bixby
- The Barbarians by Tom Godwin
- Promised Planet by Robert F. Young
- The Happy Clown by Alice Eleanor Jones